Combined spraying and polishing machine



July l, 1930. A. HERscHDoRFl-:R El' AL COMBINED SPRAYING AND POLISHING MACHINE 3 Sheets-Sheet l Filed May 12, 1926 ril/111111 July l, 1930- A. HERscHDoRFER Er AL 1,769,291

COMBINED SPRAYING A ND PoLIs'HING MACHINE Filed May 12, 1926 3 Sheets-Sheet 2 Fig/Z Patented Julyl l, 19.3() r .ARTHUR HERSCHDORFER AND GEORGE ASNESS, OF' NEW YORK, N. Y.

ooivrBINEn sPnAYiNGi-inn rorrsninel raacHrNn l Application filed May 12,l

V Y This invention relates to improvements in combined sprayingv and polishing machines, and has particular reference to a machine of this character especially adapted for use in spraying and polishing metal surfaces such as the surfaces of signs, doors, walls and the like. i y

An object of the invention is to provide a practical machinewhich will rbe eective in facilitating 'the application of a polishing liquid to a surface and in polishing said surface after the liquid has been applied.

Another object is to draw, by suction, the liquid to be sprayed fromq'a reservoir and feed said liquid to a nozzle where it is atomized by the current of air utilized to draw the liquid from said reservoir. n i

Another object is to provide` a common source of power for agitating the liquid in the reservoir and for controlling thefeed of said liquid fromV the reservoir to the spray nozzle. A further object is to provide spraying and polishing units which may be interchangeably connected to a common source of power utilized tocontroly the operation thereof. v

A still further object is the provision of a polishing roller, the effective surface v of which is yieldingly supported insuch mannerthat thesame will readily conform to the contourof iat or curved surfacesl to which said roller may be applied. The above and other objects will appear moreclearly from the following detail de-v scription, when taken in connection with the accompanying drawings, which illustrate preferred embodiments of the inventive idea.

In the drawingsn y Figure l is a longitudinal section throughy 40 gaged on the apparatus;

Figure 1A is a similar sectional view ofthe poli shingunit Figure 2 is a similar View through the spraying unit employed lin Kconnection with the machine showing the spraying head as en- 192e.y serieu No. 108,473.

trating another formof roller; and

nozzle device lof the spraying v Figure l0 is a longitudinal sectionthrough still another form of polishing device show ingthemanner ofits attachment tothe shaft of an operating motor.

Referring'more particularly to the draw-k ings, the numeral l indicates an electric motor of any desired type which 'furnishes the power for operating they various units constituting the parts of the invention. This motor isl provided with a drive shaft 2 which 31 enclosing the motor 1. This casing has secured thereto'the arms 4 and 5 to which is'atextendsthrough the front wall 2* of a casing City tached a handle 6 fastened in positionby a bolt 7 extending through the handlel tremities of the arms l and 5. Y

The spraying unit, which is adaptedl to ybe attached to thecasi'ng 3 andconnected to the appear, consists of a casing 8 having a rear wall Saand an extension @projecting from. said rear wall which fits over the. front yportion of the casing 3 with the rearwall in vabutting relation to the front wall 2a of thelatter casing. f yIn order to securefthe casing 8 in po-` sition the wall 8 thereof' is Vprovided ,with

rearwardly projectingV yhook membe'rs 51' which extend through slot-s 8c formed inthe wall2a. A. sliding latch member 51a is ver-A tically mounted in the forwardl end of vthe casing 3 and providedl at its upper end with a Vand en 1 shaft2 of the motor in a manner presently to push rod 52 normally Vprojected' outwa-rdlyy through the top ofthe casing'S bylmeans of a leaf spring v53. The latcliing member 51d is provided with slotsi-l rthrough which the hook members 5l projectand when said latchingv member isin its normal positionwith the hooks as shown 1n Figure l, the casing 8 will be locked in position on the casing 3.` By

pressing the rod 52 downwardly it will be apparent tha-t the latching member may be disengaged from the hooks 51 and thus permit of the detachment of the casing 8 from the casing 3.

When the two casings are inthe'position described the shaft 2 projects into the hub 9 of a worm gear 10, which hub is secured VtoV the wall 8 and rotatably supports said worm gear. A portion of the shaft 2 may be square or said shaft vmay be provided with a keyway so that rotation will impart a similar movementrto the worm 10. Meshing with the worm 10 is a gear 11 secured to a shaft 12 suitably supported by the wall 8a above the hub 9 and this shaft also has fixed thereto a disk 13 utilized to operate the pit- `man 14 connected to one end of the piston rod 15. The other end `of the rod 15 carries a piston 16 mounted for reciprocation in the cylinder 17 of an air pump suitably secured to the front wall of the casing 8. The cylinder 17 is provided adjacent each end thereof with Hap valve controlled air inlet ports 18 and 19 which alternately admit air into the cylinder as the piston 16 is reciprocated. The cylinder 17 is also provided with flap valve controlled outlet ports'20 and 21 for permitting the escape'of pressure from the cylinder into the outlet pipes 22 and 23, respectively, the two pipes being joined together, as shown in Figures 3 and 4. The pipe 23 terminates in a. header 24 disposed within the upper end of a hood 47. ThisV header isprovided with depending air nozzles 37, 38, 39 and 40through which passes the current of air created by the pump.

A liquid reservoir 25 is mounted upon the bottom of the casing 8 and is provided with a cover having a iiange 48 extending partly around the same, which Harige projects into a groove 49 in the top of the wall of the reservoir. A suitable Y substance may be placed in the groove 49to seal. the cover of the reservoir and thereby aid in making the latter liquid tight. The cover may also be secured in position by screws 50. Extend.- ing from theV reservoir 25 to therheader 24 is a feed pipe consisting of ay sect-ion 26 ro-V tatably connected, as at 27, to the section 28 secured in the top 30of the reservoir and having a curved extension 29. This exten sion 29 is coupled to a plurality of branches 31.32, 33 and 34 constituting a part of the Vfeed pipe, said branches ldiverging from the Y extension 29V and having their outer ends extending into the header 24. The section 26 of the feed pipe is rotatably mounted so that its outer free end willalways be immersed Y in the liquid in the reservoir regardless of the position in which the machine may be tilted while working with the same. rlhus if the front end of the machine is inclined downwardly the weight of the section 26.

posed with respect to the adjacent air nozzles that when the current of air entering the header 24 passes through the latter'nozzles a suction will be created in the nozzles 36 which will be sufficient to draw the Vliquid from the reservoir 25 outwardly into the various branches and to the nozzles 36 where said liquid will be atomized into the form of a spray and be projected outwardly against a surface by said current of air.

It may be desirable to agitate the liquid in the'reservoirV 25 and for lthis purpose there is provided a gear 43 meshing with the worm gear 10 and carried by the upper end of a shaft 45 journaledin a bearing 44 supported by the wall 8a of the casing. The shaft extends downwardly into the'reservoir 25 and carries an agitator element 46 at the lower end thereof which is constantly rotated so as to continuously agitate the liquid in the reservoir while the machine is in operation.

Afterthe spraying operation, should it be desired to use the polishing unit shown in Figures 1A and 6, the spraying unit is detached by depressing the. rod 52 to release the'hoolrs 51 from the-latching member 51 whereupon the casing 8 may be detached and the casing 41 of the polishingunit thereupon attached to the casing 3 in the same ,manner as described in connection with the casing 8. The polishing unit includes a bearing member or sleeve 42 which is adapted .to fit over the projecting end of the shaft 2 of the ya:

motor 1 and surrounded by the ball bearings 68 heldin place by means of acollar 67 The sleeve 42 carries a bevel gear 55 Vwhich meshes with a similar gear 56 fixed to the shaft 56a.y

endsof which are pivotally connected in any` suitable manner to the rear` wall of the cas ing 41.

A larger gear 59 meshes with the gear 58 and is provided with a stu-bshaft 69 which projects through the forward end of the adjacent arm 60, while the opposite arm 60 carries another stub shaft 69 similar to the first named stub shaft. Y The forward ends of the arms 60 are supported by a hanger 61 from which extend the plunger rods 62 each mounted for movement within a tubular member 63 pivot-ally connected at 98 to the top of the casing 41. I ,nterposed between the upper end of each tubular member `and the adjacent end of the plunger 62-is a coil spring 6l ,which normally exerts; a downward pressure .upon the plunger' G2 so as to forcethe hanger-6l in a downward direction. In order that the plungers 6:2 rwill be maintained within Athe tubularmembers said `plungers are provided withpins 55 projecting into longitudinal slots 6G formed inV said members. T he hanger 6l supports a polishingroller,generally indicated by the numeral 7 0,v by mounting said roller upon the stub shaftsV 69. Thus when the roller is in4 position'the same will engage a surface to lbe polished and lwill beyieldingf Y ly held in such engagement by the springs 64:.

While theroller is thus supported it will be apparent that the same will have movements y relative to the casing L.ll by reason of the piv-` otal connection of the arms 60 and members V63 with the casing 41, it being understoodY that the lower free ends of the side arms of the hanger 6l are also pivotally connected to the arms 60, as indicatedat a.

j ln the form of roller illustrated in F ig- -z ures 7 and 8, the sameris shown asincluding a body portion consisting of an outer cylindrical layer 7l of felt or any other suitable polishing material and an inner cylindrical member 72, which is preferably made of rubber` By thus constituting the body portion it will be apparent that the same has imparted thereto a'degree of lleXibility'which will permit the effective surface of theroller to conform to the contour of fiat or rounded surfacesse that the entire area of the surfaces may be engaged by the roller; The body portion of the roller is supported in concentric relation with the axis of rotation thereof by means of a plurality of leaf springs 7 8, the outer ends of which engage the inner surface of the member 72 while the inner ends of said springs are secured in any preferred manner to kthe periphery of the core 74 of the roller. In each end of the core 74 therey is mounted a bearing l75 normally forced outwardly by a coil spring 76 and having its outward movement limited by a stop 76a engaging the bearing member. A

portion of each bearing member is square so that when said member is rotated a similar movement will be imparted to the roller. The outer end of yeach bearing member is provided with a socket 77 for receiving the free end of an adjacent stub shaft 69 upon which the roller is supported. Thus when the motor l is operated rotation will be imparted tothe roller 70 through the train of gearing including the gears 55, 56, 57, 58 and 59.

The body portion of the roller including the members 7l and 72 maybe made to assume the form shown in Figure 9, due to the elasticityv of the member 72, by utilizing a I aluralit of surins 73 arranged at intervals l :e e;

about the core 74, the central springs being of shorter length than the other springs so thatl the central portion of the roller will assume Va constricted position andy thus yproduce a longitudinal curvature in t-he body portion of the roller. s The roller is further'supported by a plurality vof disks7 8 of different diameters arranged about the core 74;, said `disks being preferably, made of relatively stiff rubber,y kThe disks have their peripheries beveled-,to conformto the curvature of the adjacent portion of the member-Hoff the f In Figure l0y there isshown another form of polishing device whichis adapted for atf f tachment directly to theshaft 2.1When this form. ofthe ldevice is usedthe casingflil is dispensed with, The .device shown inFig-y ure l0 includes a shanl182terminating3at its outer end in a conical head 88. The shank 82 carries a springpressedlatch 8l one end of which rprojects through an opening in the shank and'engages in arecess 82a formed l in the end of the shaft` upon .which theY device is mounted, thus locking the device to said shaft. The head v83 is covered by an inner member 84 of rubber and an outer memp ber 85 of felt, the latter providing thepolishing medium ywhich maybe engaged L in relatively deep recesses in surfaces to be polished,

which recesses cannot be `reached with the a los forms ofrollers shown Figures 7 and `9.` What is claimed iSL.

lill) 1. portablev spraying apparatus comprising. acasing enclosing a motor havingan extending shaft, a second casing containing 'a closed tank, means for removably engage ing said casings to form a rigid unit, a multiple spray head, an air pump in thesecond casing driven by said motor shaft, and means including a pivotally mounted suction head actuated by said pump to extract liquid from said tank and forcethey same through lsaid spray head.

. '52. Aportable Aspraying apparatusfcomprising va casing containing a closedv circular tank, a reciprocating air pump, va'header `to receive air Yfrom said pump,'fa plurality of 'ets connected with said header, a hood to direct eflluent fromsaid jets, a `graiffity rotatfL able suction device in said tankfv to reach its lowermostpart irrespective of angular po-` sitiombranchesfrom said devicerassociated with said ljets to deliver liquidthereto, and means for iactuating said pump, c

3.3 A portable spraying` apparatus comprising-acasing containing a closed tank, a

air from'said pump,ia plurality of jets connecte'd with said headel` to deliver outward# ly of the'casing, a hollow arm entering the Y tank axially, branches connecting Ysaid armV and jets, means to actuate said pump, la ro tatable fan combined with said actuating means toV agitate the contents of said tank, and an intake member pivotally mounted on said arm to `swing by gravity in said tank to the lowerm-ost portion thereof automatically upon movement of the casing.

4. A portable spraying apparatus comprising acylindricalliquid reservoir, a nozzle, an automatic feed pipe movable by gravityon the axis of the reservoir and'communicating with said nozzle, means for `discharging a current of air through said nozzle to create a suction therein to draw the liquid from said reservoir and atomize the same at said` nozzle, and a rotary element for agitating the liquid in said reservoir while it is being fed from said feed pipe.

5. A hand conveyed spraying apparatus comprising a circular liquid reservoir, a nozzle, a feed pipe connecting the reservoir with said nozzle and including sections one of which'is rotatably connected to the other end disposed axially within said reservoir, means for discharging a current of air through said nozzle to create a suction therein to draw the liquid from said reservoir and atomize the same at said nozzle, rotatable paddle means for agitating the liquid in said reservoir while it is being drawn through said feed pipe, and a common source of power for operating said discharging and agit-ating means.

6. A hand conveyed spraying apparatus comprising a casing, a liquid Vreservoir in p said casing, a plurality of air nozzles sup..

ported by said casing, a plurality ofrliquid nozzles each arranged in juxtaposition to one of ysaid air'nozzles, an air pump in said casinor g, connections between said pump and air nozzles for conveying a current of air through said nozzles to create a suction in said liquid nozzles, gravity operable, revolvable connections between the latter nozzles and said reservoir through which the liquid in the reservoir is conveyed'by said suction to said liquid nozzles and there atomized by said vcurrent of air, and means for operating said air pump. Y

Y 7. A portable spraying apparatus comprising a cylindrical casing, a liquid reservoir in said casing, a plurality of air nozzles supported by said casing, aplurality of liquid nozzles eacharranged in juxtaposi- A tion to one of said air nozzles, an air pump in said casing, connections between said pump and air nozzles for conveying a current of air through said lnozzles to create a suction in said liquid nozzles, connections between the latter nozzles and said reservoir,

Said connections comprising an hollow arm downwardly inclined at its end, mounted to swin on Vthe axle of said reservoir, and through whichthe liquid in the reservoir is conveyed by said suction to said liquid nozzles and there atomized bysaid current of air irrespective of the angular position ofV lao 

